Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute.
A. 1 to 5
B. 30 to 80
C. 250 to 350
D. 450 to 500
Answer: Option B
A. 1 to 5
B. 30 to 80
C. 250 to 350
D. 450 to 500
Answer: Option B
Aniline point test of an oil qualitatively indicates the __________ content of an oil.
A. Paraffin
B. Olefin
C. Aromatic
D. Naphthene
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